In this note we introduce a general framework which allows us to prove in a unified and systematic way that operators with Wentzell-type boundary conditions generate analytic semigroups on function spaces with bounded trace operator. The abstract generation result is illustrated in three concrete examples.
"Analyticity of semigroups generated by operators with generalized Wentzell boundary conditions." Adv. Differential Equations 10 (11) 1301 - 1320, 2005.